PASS Test addSourceBuffer() while closed.
PASS Test removeSourceBuffer() while closed.
PASS Test endOfStream() while closed.
+PASS Test endOfStream(decode) while closed.
+PASS Test endOfStream(network) while closed.
PASS Test setting duration while closed.
+PASS Test setting duration while open->closed.
+PASS Test getting duration while open->closed.
+PASS Test sourcebuffer.abort when closed.